From f8ff9c832d45d44007e936ad3110c227241612d8 Mon Sep 17 00:00:00 2001
From: kangenbo <kangenbo@huawei.com>
Date: Mon, 15 Apr 2019 16:38:23 -0400
Subject: [PATCH 52/83] endpoint(pty),bug fix: list the same fd in a different process

Description: This change is simillar to 28f96d58 (endpoint(pipe),fix: list the same
fd in a different process).  28f96d58 is about pipe. This change is about pty.

Source: backport patch from github, see following in detail:
https://github.com/lsof-org/lsof-linux/commit/cea5e144ee6ac16fd0c82c0a7d25790d5f60b823

---
 dialects/linux/dnode.c | 10 +++++-----
 proc.c                 |  4 ++--
 proto.h                |  2 +-
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/dialects/linux/dnode.c b/dialects/linux/dnode.c
index ddd99cf..ee12227 100644
--- a/dialects/linux/dnode.c
+++ b/dialects/linux/dnode.c
@@ -307,7 +307,8 @@ enter_ptmxi(mn)
  */
 
 pxinfo_t *
-find_ptyepti(lf, m, pp)
+find_ptyepti(pid, lf, m, pp)
+	int pid;
 	struct lfile *lf;		/* pseudoterminal's lfile */
 	int m;				/* minor number type:
 					 *     0 == use tty_index
@@ -319,6 +320,7 @@ find_ptyepti(lf, m, pp)
 	int h;				/* hash result */
 	INODETYPE mn;			/* minor number */
 	pxinfo_t *pi;			/* pseudoterminal info pointer */
+	struct lproc *ep;
 
 
 	mn = m ? GET_MIN_DEV(lf->rdev) : lf->tty_index;
@@ -332,12 +334,10 @@ find_ptyepti(lf, m, pp)
 	    while (pi) {
 		if (pi->ino == mn) {
 		    ef = pi->lf;
-		    if (((m && is_pty_ptmx(ef->rdev))
+		    ep = &Lproc[pi->lpx];
+		    if ((m && is_pty_ptmx(ef->rdev))
 		    ||  ((!m) && is_pty_slave(GET_MAJ_DEV(ef->rdev))))
-		    &&   strcmp(lf->fd, ef->fd)
-		    ) {
 			return(pi);
-		    }
 		}
 		pi = pi->next;
 	     }
diff --git a/proc.c b/proc.c
index e4c3591..7fe3998 100644
--- a/proc.c
+++ b/proc.c
@@ -1443,7 +1443,7 @@ process_ptyinfo(f)
 		 */
 		    pc = 1;
 		    do {
-			if ((pp = find_ptyepti(Lf, !mos, pp))) {
+			if ((pp = find_ptyepti(Lp->pid, Lf, !mos, pp))) {
 
 			/*
 			 * This pseudoterminal endpoint is linked to the
@@ -1468,7 +1468,7 @@ process_ptyinfo(f)
 		    Lp->pss |= PS_SEC;
 		    pc = 1;
 		    do {
-			if ((pp = find_ptyepti(Lf, !mos, pp))) {
+			if ((pp = find_ptyepti(Lp->pid, Lf, !mos, pp))) {
 			    prt_ptyinfo(pp, (mos && pc), 0);
 			    pp = pp->next;
 			    pc = 0;
diff --git a/proto.h b/proto.h
index 7f65d67..2df360a 100644
--- a/proto.h
+++ b/proto.h
@@ -122,7 +122,7 @@ _PROTOTYPE(extern void process_uxsinfo,(int f));
 #  if	defined(HASPTYEPT)
 _PROTOTYPE(extern void clear_ptyinfo,(void));
 _PROTOTYPE(extern void enter_ptmxi,(int mn));
-_PROTOTYPE(extern pxinfo_t *find_ptyepti,(struct lfile *lf,int m,pxinfo_t *pp));
+_PROTOTYPE(extern pxinfo_t *find_ptyepti,(int pid, struct lfile *lf,int m,pxinfo_t *pp));
 _PROTOTYPE(extern int is_pty_slave,(int sm));
 _PROTOTYPE(extern int is_pty_ptmx,(dev_t dev));
 _PROTOTYPE(extern void process_ptyinfo,(int f));
-- 
1.8.3.1